/* Rhythm Trainer
 *
 * Build pieces and keycaps. The four Fortnite build pieces are the palette and
 * each area of the page is keyed to one: tempo is floor yellow, the loop is ramp
 * green, session options are wall blue, sound is roof pink, keys are edit
 * violet. Every control is a keycap with a bottom edge that presses down,
 * because the whole app is about pressing keys on time. Anything live or
 * time-based (the stage, the loop bar, the judgement) sits on a dark screen;
 * everything else is lavender paper.
 */

:root {
  color-scheme: light;

  --bg: #f1efff;
  --surface: #ffffff;
  --surface-2: #f6f4ff;
  --line: #dfdaf7;
  --line-strong: #c9c2ee;
  --ink: #1a1540;
  --ink-2: #625d8c;

  --screen: #17123a;
  --screen-2: #211b4c;
  --screen-line: rgba(255, 255, 255, 0.12);
  --screen-ink: #f4f2ff;
  --screen-ink-2: #b3aedd;

  --blue: #3b6cff;    --blue-edge: #2347c9;
  --yellow: #ffc21a;  --yellow-edge: #d38f00;
  --green: #1fc67a;   --green-edge: #10945a;
  --pink: #ff4d9d;    --pink-edge: #cc2a74;
  --violet: #8a5bff;  --violet-edge: #6236d6;
  --danger: #ff5a4e;  --danger-edge: #c9352b;

  /* Grade colours (D12). These are the same three the canvas uses, verified in
     test/render.test.js against protanopia, deuteranopia and tritanopia
     simulations. Colour is never the only channel: the canvas also marks each
     grade with a shape and the three are separated in luminance. They are only
     shown on dark screens, where they were measured. */
  --grade-perfect: #4fc3f7;
  --grade-good: #ffd54f;
  --grade-miss: #ff5c8a;

  /* The same three meanings as text on paper, dark enough to read there. */
  --good: #0b7fb8;
  --warn: #9a6400;
  --bad: #d81e5b;

  /* Older names the tool pages still use. */
  --panel: var(--surface);
  --dim: var(--ink-2);
  --text: var(--ink);
  --accent: var(--blue);

  --font-display: "Big Shoulders Display", "Arial Narrow", Impact, sans-serif;
  --font-ui: "Onest", ui-sans-serif, system-ui, -apple-system, sans-serif;
  --font-mono: "JetBrains Mono", ui-monospace, SFMono-Regular, monospace;

  --r-card: 18px;
  --r-btn: 12px;
  --r-screen: 20px;
  --shadow-card: 0 1px 0 rgba(26, 21, 64, 0.04), 0 10px 28px -16px rgba(26, 21, 64, 0.28);

  --chevron: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 12 12'%3E%3Cpath d='M2.5 4.5 6 8l3.5-3.5' fill='none' stroke='%231a1540' stroke-width='1.8' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E");
}

@media (prefers-color-scheme: dark) {
  :root {
    color-scheme: dark;
    --bg: #100d27;
    --surface: #1b1741;
    --surface-2: #241f52;
    --line: #2f2965;
    --line-strong: #433b86;
    --ink: #f4f2ff;
    --ink-2: #a9a4d6;
    --screen: #0a081d;
    --screen-2: #141036;
    --good: #4fc3f7;
    --warn: #ffd54f;
    --bad: #ff7aa2;
    --shadow-card: 0 10px 28px -16px rgba(0, 0, 0, 0.7);
    --chevron: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 12 12'%3E%3Cpath d='M2.5 4.5 6 8l3.5-3.5' fill='none' stroke='%23f4f2ff' stroke-width='1.8' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E");
  }
}

/* ------------------------------------------------------------------ base */

* { box-sizing: border-box; }

html, body {
  margin: 0;
  height: 100%;
  background: var(--bg);
  color: var(--ink);
  font: 400 14px/1.45 var(--font-ui);
  -webkit-font-smoothing: antialiased;
}

body { display: flex; flex-direction: column; }

a { color: var(--blue); }
.spacer { flex: 1; }
.sub { color: var(--ink-2); font-size: 12px; }
[hidden] { display: none !important; }

h1, h2, h3 { font-family: var(--font-display); font-weight: 900; text-transform: uppercase; letter-spacing: 0.03em; line-height: 1; }

kbd {
  display: inline-block;
  margin-left: 6px;
  padding: 1px 6px;
  border-radius: 6px;
  border: 1px solid currentColor;
  font: 700 10px/1.5 var(--font-mono);
  opacity: 0.7;
}

/* --------------------------------------------------------------- keycaps */

button {
  font: 600 13px/1.2 var(--font-ui);
  color: var(--ink);
  background: var(--surface);
  border: 1px solid var(--line-strong);
  border-radius: var(--r-btn);
  min-height: 36px;
  padding: 8px 14px;
  box-shadow: 0 2px 0 var(--line-strong);
  cursor: pointer;
  white-space: nowrap;
  transition: transform 70ms ease, box-shadow 70ms ease, background 120ms ease, color 120ms ease;
}
button:hover:not(:disabled) { background: var(--surface-2); }
button:active:not(:disabled) { transform: translateY(2px); box-shadow: 0 0 0 transparent; }
button:focus-visible, select:focus-visible, input:focus-visible, a:focus-visible, summary:focus-visible {
  outline: 3px solid color-mix(in srgb, var(--blue) 60%, transparent);
  outline-offset: 2px;
}
button:disabled { opacity: 0.4; cursor: default; }

button.primary {
  background: var(--yellow);
  border-color: var(--yellow-edge);
  color: #1a1540;
  font-weight: 700;
  box-shadow: 0 3px 0 var(--yellow-edge);
}
button.primary:hover:not(:disabled) { background: #ffcd45; }
button.primary.danger, button.primary.danger:hover:not(:disabled) {
  background: var(--danger);
  border-color: var(--danger-edge);
  color: #fff;
  box-shadow: 0 3px 0 var(--danger-edge);
}
button.start { min-height: 42px; padding: 10px 22px; font-size: 14px; border-radius: 14px; }

button.tiny {
  min-height: 28px;
  padding: 4px 10px;
  font-size: 12px;
  border-radius: 9px;
}

.icon-btn {
  display: inline-grid;
  place-items: center;
  width: 36px;
  padding: 0;
}
.icon-btn svg { width: 15px; height: 15px; fill: none; stroke: currentColor; stroke-width: 1.6; stroke-linejoin: round; stroke-linecap: round; }
.icon-btn.danger:not(:disabled):hover { color: var(--danger); border-color: var(--danger); box-shadow: 0 2px 0 var(--danger-edge); }

/* ---------------------------------------------------------------- inputs */

select, input[type="text"], input[type="number"], input:not([type]) {
  font: 600 13px/1.2 var(--font-ui);
  color: var(--ink);
  background: var(--surface-2);
  border: 1px solid var(--line);
  border-radius: 10px;
  min-height: 36px;
  padding: 8px 12px;
}
select {
  appearance: none;
  -webkit-appearance: none;
  padding-right: 32px;
  background: var(--surface-2) var(--chevron) no-repeat right 11px center / 12px;
  cursor: pointer;
  text-overflow: ellipsis;
}
select:hover, input[type="text"]:hover, input[type="number"]:hover { border-color: var(--line-strong); }
input[type="number"] { width: 76px; font-family: var(--font-mono); font-variant-numeric: tabular-nums; }

label { color: var(--ink-2); font-size: 12px; display: inline-flex; gap: 6px; align-items: center; }
label.inline { color: var(--ink); font-size: 13px; margin: 8px 0; }

/* A checkbox in a .toggle is a switch, tinted by the card it sits in. */
.toggle {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 10px 0;
  color: var(--ink);
  font-size: 13px;
  cursor: pointer;
  border-top: 1px solid var(--line);
}
.card-head + .toggle { border-top: 0; padding-top: 2px; }
.toggle span { flex: 1; }
.toggle input, .settingsui input[type="checkbox"] {
  order: 2;
  appearance: none;
  -webkit-appearance: none;
  position: relative;
  flex: 0 0 auto;
  width: 40px;
  height: 24px;
  margin: 0;
  border-radius: 999px;
  background: var(--line-strong);
  cursor: pointer;
  transition: background 140ms ease;
}
.toggle input::after, .settingsui input[type="checkbox"]::after {
  content: "";
  position: absolute;
  top: 3px;
  left: 3px;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: #fff;
  box-shadow: 0 1px 0 rgba(26, 21, 64, 0.25), 0 2px 4px rgba(26, 21, 64, 0.2);
  transition: transform 140ms ease;
}
.toggle input:checked, .settingsui input[type="checkbox"]:checked { background: var(--tint, var(--blue)); }
.toggle input:checked::after, .settingsui input[type="checkbox"]:checked::after { transform: translateX(16px); }
.settingsui input[type="checkbox"]:disabled { opacity: 0.45; cursor: default; }
.toggle-center { justify-content: center; border: 0; }
.toggle-center span { flex: 0 1 auto; }

/* A number with its name before it and its unit after. */
.numfield {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 8px 0;
  color: var(--ink);
  font-size: 13px;
  border-top: 1px solid var(--line);
}
.numfield > span { flex: 1; }
.numfield em { min-width: 38px; color: var(--ink-2); font-style: normal; font-size: 12px; }
.numfield select { min-width: 120px; }

/* -------------------------------------------------------------- page nav */

.sitenav { display: flex; gap: 4px; align-items: center; font-size: 13px; flex-wrap: wrap; }
.sitenav a, .sitenav .here {
  padding: 7px 13px;
  border-radius: 999px;
  color: var(--ink-2);
  text-decoration: none;
  font-weight: 600;
  white-space: nowrap;
}
.sitenav a:hover { color: var(--ink); background: var(--surface); }
.sitenav .here { color: #fff; background: var(--ink); }
@media (prefers-color-scheme: dark) { .sitenav .here { color: var(--bg); } }
body > .sitenav, #sitenav > .sitenav { margin: 0 0 18px; }
.bar #sitenav > .sitenav, .pagenav > .sitenav { margin: 0; }

/* ------------------------------------------------------------ the header */

.topbar { flex: 0 0 auto; display: grid; grid-template-columns: minmax(0, 1fr); gap: 12px; padding: 14px 20px 0; }
.brandrow { display: flex; align-items: center; gap: 18px; min-width: 0; }

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: var(--ink);
  text-decoration: none;
  white-space: nowrap;
}
.brand-mark { display: grid; grid-template-columns: repeat(2, 11px); gap: 3px; transform: rotate(-8deg); }
.brand-mark i { width: 11px; height: 11px; border-radius: 3px; }
.brand-mark i:nth-child(1) { background: var(--blue); }
.brand-mark i:nth-child(2) { background: var(--yellow); }
.brand-mark i:nth-child(3) { background: var(--green); }
.brand-mark i:nth-child(4) { background: var(--pink); }
.brand-name, .bar .brand {
  font: 900 26px/1 var(--font-display);
  letter-spacing: 0.03em;
  text-transform: uppercase;
}
.pagenav { min-width: 0; overflow-x: auto; scrollbar-width: none; }

.drillbar {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 10px;
  padding: 10px;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--r-card);
  box-shadow: var(--shadow-card);
}
.drillbar .field { display: inline-flex; align-items: center; gap: 8px; min-width: 0; }
.drillbar .field select { min-width: 0; }
.field-drill select { width: clamp(160px, 17vw, 300px); }
.segment-picker select { width: clamp(140px, 13vw, 240px); }
.profile-picker select { width: 140px; }
.field-label {
  color: var(--ink-2);
  font: 800 14px/1 var(--font-display);
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

/* The Video / Piano switch: wall blue and roof pink. */
.view-mode-toggle {
  display: inline-flex;
  gap: 3px;
  padding: 3px;
  background: var(--surface-2);
  border: 1px solid var(--line);
  border-radius: 13px;
}
.mode-btn {
  min-height: 32px;
  padding: 6px 14px;
  border: 0;
  border-radius: 10px;
  background: transparent;
  box-shadow: none;
  color: var(--ink-2);
  font: 800 15px/1 var(--font-display);
  letter-spacing: 0.08em;
  text-transform: uppercase;
}
.mode-btn:hover:not(:disabled) { background: var(--surface); color: var(--ink); }
#btn-mode-video.active { background: var(--blue); color: #fff; box-shadow: 0 2px 0 var(--blue-edge); }
#btn-mode-piano.active { background: var(--pink); color: #fff; box-shadow: 0 2px 0 var(--pink-edge); }

/* --------------------------------------------------------------- layout */

main { flex: 1; display: flex; min-height: 0; }

.workspace {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 340px;
  gap: 16px;
  padding: 16px 20px 20px;
}

.stage-column {
  display: flex;
  flex-direction: column;
  min-width: 0;
  min-height: 0;
  overflow: hidden;
  background: var(--screen);
  border-radius: var(--r-screen);
  box-shadow: 0 24px 48px -24px rgba(23, 18, 58, 0.6), inset 0 0 0 1px rgba(255, 255, 255, 0.04);
}

.stage { flex: 1; position: relative; min-width: 0; overflow: hidden; }
#stage { min-height: 0; background: var(--screen); color: var(--screen-ink); }

/* A soft dark edge at the top so the session chips read over sky. */
#stage::after {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 1;
  pointer-events: none;
  background: linear-gradient(180deg, rgba(10, 8, 29, 0.6), transparent 20%);
}

#notes {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  display: block;
  pointer-events: none;
  z-index: 2;
}
/* In Video mode the falling lanes are hidden so the gameplay fills the stage. */
body[data-view-mode="video"] #notes { display: none; }
body[data-view-mode="piano"] #notes { display: block; }

.clip {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: contain;
  background: var(--screen);
  z-index: 1;
}

.no-clip-notice {
  position: absolute;
  top: 42%;
  left: 50%;
  z-index: 2;
  transform: translate(-50%, -50%);
  padding: 22px 30px;
  border-radius: var(--r-card);
  background: var(--screen-2);
  border: 1px dashed var(--screen-line);
  text-align: center;
  pointer-events: none;
}
.no-clip-title { font: 900 24px/1 var(--font-display); text-transform: uppercase; letter-spacing: 0.04em; }
.no-clip-sub { margin-top: 6px; color: var(--screen-ink-2); font-size: 13px; }

.hud { flex: 0 0 300px; min-height: 0; overflow-y: auto; padding: 16px; background: var(--surface); border-left: 1px solid var(--line); }
.workspace .hud { padding: 0 2px 4px 0; background: none; border: 0; scrollbar-width: thin; }

/* -------------------------------------------------------- the side panel */

.hud-tabs {
  position: sticky;
  top: 0;
  z-index: 3;
  display: grid;
  grid-auto-flow: column;
  grid-auto-columns: 1fr;
  gap: 4px;
  padding: 5px;
  margin-bottom: 12px;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 16px;
  box-shadow: var(--shadow-card);
}
.hud-tab {
  min-height: 36px;
  padding: 6px 4px;
  border: 0;
  border-radius: 11px;
  background: transparent;
  box-shadow: none;
  color: var(--ink-2);
  font: 800 16px/1 var(--font-display);
  letter-spacing: 0.08em;
  text-transform: uppercase;
}
.hud-tab::before {
  content: "";
  display: inline-block;
  width: 8px;
  height: 8px;
  margin: 0 6px 1px 0;
  border-radius: 2px;
  background: var(--tint);
  vertical-align: middle;
}
.hud-tab:hover:not(:disabled) { background: var(--surface-2); color: var(--ink); }
.hud-tab[aria-selected="true"], .hud-tab[aria-selected="true"]:hover {
  background: var(--tint);
  color: var(--tint-ink, #fff);
  box-shadow: 0 3px 0 var(--tint-edge);
}
.hud-tab[aria-selected="true"]::before { background: currentColor; opacity: 0.5; }

.tab-play, .card-tempo { --tint: var(--yellow); --tint-edge: var(--yellow-edge); --tint-ink: #1a1540; }
.card-loop { --tint: var(--green); --tint-edge: var(--green-edge); }
.tab-session, .card-session { --tint: var(--blue); --tint-edge: var(--blue-edge); }
.tab-sound, .card-sound { --tint: var(--pink); --tint-edge: var(--pink-edge); }
.tab-keys, .card-keys { --tint: var(--violet); --tint-edge: var(--violet-edge); }
.card-score { --tint: var(--blue); --tint-edge: var(--blue-edge); }

.card {
  padding: 14px 16px;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--r-card);
  box-shadow: var(--shadow-card);
}
.card + .card { margin-top: 12px; }
.card:empty { display: none; }
.card-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  margin-bottom: 10px;
}
.card-head .label, .card > .label {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--ink);
  font: 800 17px/1 var(--font-display);
  letter-spacing: 0.08em;
  text-transform: uppercase;
}
.card-head .label::before {
  content: "";
  width: 12px;
  height: 12px;
  border-radius: 4px;
  background: var(--tint);
  box-shadow: 0 2px 0 var(--tint-edge);
}
.card > .sub { margin-top: 8px; }

/* Tempo: a big readout between two big keys. */
.tempo-dial { display: grid; grid-template-columns: 52px 1fr 52px; align-items: center; gap: 10px; }
.tempo-step {
  min-height: 52px;
  padding: 0;
  font: 900 28px/1 var(--font-display);
  border-radius: 14px;
}
.tempo .value {
  color: var(--ink);
  text-align: center;
  font: 900 64px/0.9 var(--font-display);
  letter-spacing: -0.01em;
  font-variant-numeric: tabular-nums;
}
.presets { display: grid; grid-template-columns: repeat(4, 1fr); gap: 6px; margin-top: 12px; }
.presets button { font-family: var(--font-mono); font-weight: 700; padding-inline: 4px; }
.presets button.active, .presets button.active:hover {
  background: var(--yellow);
  border-color: var(--yellow-edge);
  color: #1a1540;
  box-shadow: 0 2px 0 var(--yellow-edge);
}

/* Loop: beats as ticks on a dark strip, the loop shaded green, its two ends
   as handles. */
.loopbox-actions { display: flex; gap: 6px; }
.loop-bar {
  position: relative;
  height: 48px;
  overflow: hidden;
  border-radius: 12px;
  background: var(--screen);
  cursor: grab;
  touch-action: none;
  user-select: none;
}
.loop-bar:active { cursor: grabbing; }
.loop-bar canvas { position: absolute; inset: 0; width: 100%; height: 100%; pointer-events: none; }
.loop-range {
  position: absolute;
  top: 0;
  bottom: 0;
  background: color-mix(in srgb, var(--green) 30%, transparent);
  box-shadow: inset 0 -3px 0 var(--green);
  pointer-events: none;
}
.loop-playhead { position: absolute; top: 0; bottom: 0; left: -1px; width: 2px; background: var(--yellow); pointer-events: none; }
.loop-handle { position: absolute; top: 0; bottom: 0; width: 24px; margin-left: -12px; cursor: ew-resize; touch-action: none; }
.loop-handle::after {
  content: "";
  position: absolute;
  top: 6px;
  bottom: 6px;
  left: 7px;
  width: 10px;
  border-radius: 5px;
  background: var(--green);
  box-shadow: 0 0 0 2px var(--screen), 0 2px 0 2px var(--green-edge);
}
.loop-times {
  display: flex;
  justify-content: space-between;
  gap: 6px;
  margin-top: 6px;
  color: var(--ink-2);
  font: 500 11px/1.3 var(--font-mono);
  white-space: nowrap;
}
#loop-zoom-label { overflow: hidden; text-overflow: ellipsis; }
.loop-row { display: flex; align-items: center; gap: 6px; margin-top: 10px; flex-wrap: wrap; }
.loop-row .spacer { flex: 1; }
.loop-nudge { display: inline-flex; gap: 4px; }
.loop-row > .loop-nudge:nth-child(2) { margin: 0 auto; }
.loop-nudge button { min-width: 30px; }
.loop-steps .sub { margin-right: 2px; }
.loop-steps button { font-family: var(--font-mono); }
.loop-steps button.active, .loop-steps button.active:hover {
  background: var(--green);
  border-color: var(--green-edge);
  color: #fff;
  box-shadow: 0 2px 0 var(--green-edge);
}
.loop-here button { flex: 1; }

/* Score: the judgement on a dark screen, the numbers under it. */
.judgement {
  margin: 0 0 12px;
  padding: 16px 10px 14px;
  border-radius: 14px;
  background: var(--screen);
  color: var(--screen-ink-2);
  text-align: center;
  font: 900 42px/1 var(--font-display);
  letter-spacing: 0.06em;
  text-transform: uppercase;
  box-shadow: inset 0 -4px 0 rgba(0, 0, 0, 0.35);
}
.judgement.perfect { color: var(--grade-perfect); text-shadow: 0 0 22px color-mix(in srgb, var(--grade-perfect) 55%, transparent); }
.judgement.good { color: var(--grade-good); text-shadow: 0 0 22px color-mix(in srgb, var(--grade-good) 45%, transparent); }
.judgement.miss, .judgement.fail { color: var(--grade-miss); text-shadow: 0 0 22px color-mix(in srgb, var(--grade-miss) 45%, transparent); }

.warnings { margin: 0 0 12px; display: flex; flex-direction: column; gap: 8px; }
.warnings:empty { display: none; }
.warnings .note {
  padding: 9px 11px;
  border-radius: 10px;
  border-left: 4px solid var(--yellow);
  background: color-mix(in srgb, var(--yellow) 13%, var(--surface));
  color: var(--ink);
  font-size: 12px;
  line-height: 1.45;
}
/* A blocking warning is not a hint. It says the grade you are about to see is
   not a grade, so it reads louder than the placeholder-floor note. */
.warnings .note.block { border-left-color: var(--danger); background: color-mix(in srgb, var(--danger) 12%, var(--surface)); }

.stats { display: grid; grid-template-columns: 1fr auto; gap: 7px 12px; margin: 0; }
.stats:empty { display: none; }
.stats dt { color: var(--ink-2); font-size: 12px; }
.stats dd { margin: 0; text-align: right; font: 700 13px/1.4 var(--font-mono); font-variant-numeric: tabular-nums; }
.stats dd.diag { color: var(--ink-2); font-weight: 500; }
.stats .rownote { grid-column: 1 / -1; margin: -4px 0 2px; color: var(--ink-2); font-size: 11px; }

.diagnostics { margin-top: 12px; padding-top: 10px; border-top: 1px solid var(--line); }
.diagnostics summary {
  cursor: pointer;
  color: var(--ink-2);
  font: 800 14px/1 var(--font-display);
  letter-spacing: 0.1em;
  text-transform: uppercase;
}
.diagnostics[open] summary { margin-bottom: 10px; }

/* Sound and keys. */
.latency-row { display: flex; align-items: center; gap: 10px; }
.latency-row .numfield { flex: 1; border: 0; padding: 0; }
#latency-note:not(:empty) { margin-top: 8px; }

.soundboard { margin: 0 0 8px; }
.soundmap { width: 100%; border-collapse: collapse; font-size: 12px; }
.soundmap th { padding: 0 4px 6px; color: var(--ink-2); font-weight: 600; text-align: left; font-size: 11px; }
.soundmap td { padding: 5px 4px; border-top: 1px solid var(--line); }
.soundmap tr:not(:first-child) { cursor: pointer; }
.soundmap tr:not(:first-child):hover td { background: var(--surface-2); }
.soundmap td:nth-child(2) { font: 700 12px var(--font-mono); }
.soundmap button { min-height: 26px; padding: 2px 8px; }

.bindlist { display: flex; flex-direction: column; }
.bindrow { display: flex; align-items: center; gap: 8px; padding: 6px 0; font-size: 13px; border-top: 1px solid var(--line); }
.bindrow:first-child { border-top: 0; }
.bindrow span { color: var(--ink-2); }
.bindrow button, .settingsui .bindtable td:nth-child(2) button {
  margin-left: auto;
  min-width: 70px;
  min-height: 32px;
  padding: 4px 10px;
  font: 700 12px var(--font-mono);
  border-radius: 9px;
}
.bindrow button.listening, .settingsui .bindtable button.listening, #binds-table button.listening {
  background: var(--violet);
  border-color: var(--violet-edge);
  color: #fff;
  box-shadow: 0 2px 0 var(--violet-edge);
}
#hud-calib:not(:empty) { margin-top: 8px; }

.device { font-size: 13px; font-weight: 600; margin-bottom: 4px; }

/* D14: ratios against each device's own baseline, never against each other. */
.compare .label { display: block; margin-bottom: 8px; font: 800 17px/1 var(--font-display); letter-spacing: 0.08em; text-transform: uppercase; }
.compare table { width: 100%; border-collapse: collapse; font-size: 12px; }
.compare th { padding-bottom: 4px; color: var(--ink-2); font-weight: 500; font-size: 11px; text-align: right; }
.compare th:first-child, .compare td:first-child { text-align: left; }
.compare td { padding: 3px 0; text-align: right; font-family: var(--font-mono); font-variant-numeric: tabular-nums; }
.compare .better { color: var(--good); }
.compare .sub { margin-top: 8px; line-height: 1.4; }

/* -------------------------------------------------- the transport strip */

.stage-transport {
  flex: 0 0 auto;
  display: grid;
  gap: 8px;
  padding: 10px 12px 12px;
  background: var(--screen-2);
  border-top: 1px solid var(--screen-line);
  color: var(--screen-ink);
}
.transport-main { display: flex; align-items: center; gap: 8px; }
.transport-tools { display: flex; align-items: center; gap: 8px; flex-wrap: wrap; }
.transport-group { display: inline-flex; gap: 4px; padding-right: 8px; border-right: 1px solid var(--screen-line); }
.transport-group:last-child { border-right: 0; margin-left: auto; padding-right: 0; }

.transport-button {
  min-height: 32px;
  padding: 6px 11px;
  border-color: rgba(255, 255, 255, 0.1);
  border-radius: 10px;
  background: rgba(255, 255, 255, 0.07);
  box-shadow: 0 2px 0 rgba(0, 0, 0, 0.4);
  color: var(--screen-ink);
  font-size: 12px;
}
.transport-button:hover:not(:disabled) { background: rgba(255, 255, 255, 0.14); }
.frames .transport-button { font-family: var(--font-mono); font-size: 11px; padding-inline: 9px; }
.transport-primary, .transport-primary:hover:not(:disabled) {
  min-width: 112px;
  min-height: 40px;
  background: var(--yellow);
  border-color: var(--yellow-edge);
  box-shadow: 0 3px 0 var(--yellow-edge);
  color: #1a1540;
  font: 800 16px/1 var(--font-display);
  letter-spacing: 0.08em;
  text-transform: uppercase;
}
.transport-primary:hover:not(:disabled) { background: #ffcd45; }
.transport-main > .transport-button:not(.transport-primary) { min-height: 40px; }
.transport-button.danger:not(:disabled):hover { color: #fff; background: var(--danger); border-color: var(--danger-edge); box-shadow: 0 2px 0 var(--danger-edge); }

.scrubber { flex: 1; min-width: 120px; }
.scrubber input[type="range"], #scrub {
  -webkit-appearance: none;
  appearance: none;
  display: block;
  width: 100%;
  height: 22px;
  margin: 0;
  background: transparent;
  cursor: pointer;
}
.scrubber input[type="range"]::-webkit-slider-runnable-track, #scrub::-webkit-slider-runnable-track {
  height: 8px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.14);
}
.scrubber input[type="range"]::-webkit-slider-thumb, #scrub::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 20px;
  height: 20px;
  margin-top: -6px;
  border-radius: 50%;
  background: var(--yellow);
  box-shadow: 0 2px 0 var(--yellow-edge), 0 0 0 5px rgba(255, 194, 26, 0.22);
}
.scrubber input[type="range"]::-moz-range-track, #scrub::-moz-range-track { height: 8px; border-radius: 999px; background: rgba(255, 255, 255, 0.14); }
.scrubber input[type="range"]::-moz-range-progress, #scrub::-moz-range-progress { height: 8px; border-radius: 999px; background: var(--green); }
.scrubber input[type="range"]::-moz-range-thumb, #scrub::-moz-range-thumb {
  width: 20px;
  height: 20px;
  border: 0;
  border-radius: 50%;
  background: var(--yellow);
  box-shadow: 0 2px 0 var(--yellow-edge), 0 0 0 5px rgba(255, 194, 26, 0.22);
}
.scrub-labels {
  display: flex;
  justify-content: space-between;
  color: var(--screen-ink-2);
  font: 500 10px/1.2 var(--font-mono);
  font-variant-numeric: tabular-nums;
}

/* ------------------------------------------------- on the stage, in play */

.stage-context {
  position: absolute;
  top: 16px;
  left: 18px;
  right: 18px;
  z-index: 5;
  display: flex;
  align-items: center;
  gap: 10px;
  pointer-events: none;
  min-width: 0;
}
.session-state {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 5px 11px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.12);
  backdrop-filter: blur(8px);
  color: var(--screen-ink);
  font: 800 13px/1 var(--font-display);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  white-space: nowrap;
}
.session-state::before { content: ""; width: 7px; height: 7px; border-radius: 50%; background: var(--screen-ink-2); }
.session-state.live { background: var(--green); color: #fff; }
.session-state.live::before { background: #fff; animation: pulse 1s ease-in-out infinite; }
.session-state.recovery { background: var(--yellow); color: #1a1540; }
.session-state.recovery::before { background: #1a1540; }
.session-title {
  overflow: hidden;
  font-weight: 700;
  font-size: 14px;
  white-space: nowrap;
  text-overflow: ellipsis;
  text-shadow: 0 1px 6px rgba(0, 0, 0, 0.8);
}
.session-segment { color: var(--screen-ink-2); font-size: 12px; white-space: nowrap; text-shadow: 0 1px 6px rgba(0, 0, 0, 0.8); }
@keyframes pulse { 50% { opacity: 0.3; } }

/* The next action, as the key to press drawn as a keycap. */
.action-coach {
  position: absolute;
  z-index: 6;
  top: 11%;
  left: 50%;
  width: min(760px, calc(100% - 48px));
  transform: translateX(-50%);
  text-align: center;
  pointer-events: none;
  transition: opacity 120ms ease;
}
.action-coach.idle { opacity: 0.8; }
.coach-kicker {
  margin-bottom: 10px;
  color: var(--screen-ink);
  font: 800 14px/1 var(--font-display);
  letter-spacing: 0.22em;
  text-transform: uppercase;
  text-shadow: 0 2px 8px rgba(0, 0, 0, 0.9);
}
.coach-cards { display: flex; justify-content: center; align-items: stretch; gap: 12px; }
.coach-card {
  min-width: 150px;
  max-width: 250px;
  padding: 14px 16px 14px;
  border: 1px solid rgba(255, 255, 255, 0.14);
  border-radius: 20px;
  background: rgba(14, 11, 38, 0.78);
  backdrop-filter: blur(10px);
  box-shadow: 0 16px 36px rgba(0, 0, 0, 0.35);
  color: var(--screen-ink);
}
.coach-cards .coach-card:not(.primary) { opacity: 0.72; transform: scale(0.9); transform-origin: top center; }
.coach-card.primary { border: 2px solid var(--yellow); }
.coach-card.wrong { border: 2px solid var(--danger); }
.coach-key {
  display: inline-block;
  min-width: 1.4em;
  padding: 0.12em 0.32em 0.1em;
  border-radius: 0.24em;
  background: #fff;
  color: #1a1540;
  font: 800 clamp(26px, 3.8vw, 52px)/1 var(--font-mono);
  letter-spacing: -0.03em;
  box-shadow: 0 0.1em 0 #c9c2ee, 0 0.18em 0.3em rgba(0, 0, 0, 0.35);
}
.coach-action { display: block; margin-top: 12px; font: 800 20px/1.05 var(--font-display); letter-spacing: 0.06em; text-transform: uppercase; }
.coach-direction { display: block; margin-top: 2px; color: #b9a2ff; font-size: 12px; font-weight: 700; }
.coach-keyrow { display: flex; align-items: center; justify-content: center; gap: 10px; }
.coach-arrow { color: var(--yellow); font: 900 clamp(26px, 3.8vw, 52px)/1 var(--font-display); text-shadow: 0 3px 14px rgba(0, 0, 0, 0.9); }
.coach-hint {
  min-height: 18px;
  margin-top: 12px;
  color: var(--screen-ink);
  font-size: 13px;
  text-shadow: 0 2px 8px rgba(0, 0, 0, 0.95);
}

.coach-held { display: flex; justify-content: center; align-items: center; flex-wrap: wrap; gap: 8px; margin-top: 12px; }
.held-label { color: var(--yellow); font: 800 13px/1 var(--font-display); letter-spacing: 0.16em; text-transform: uppercase; text-shadow: 0 2px 8px #000; }
.held-chip {
  display: inline-grid;
  grid-template-columns: auto auto;
  align-items: center;
  column-gap: 8px;
  padding: 6px 10px 7px;
  border: 2px solid var(--yellow);
  border-radius: 12px;
  background: rgba(14, 11, 38, 0.82);
}
.held-key { font: 800 17px/1 var(--font-mono); color: #fff; }
.held-name { font-size: 12px; font-weight: 700; color: var(--screen-ink-2); }
.held-bar { grid-column: 1 / -1; height: 4px; margin-top: 6px; border-radius: 2px; background: rgba(255, 255, 255, 0.14); overflow: hidden; }
.held-bar i { display: block; height: 100%; background: var(--yellow); }

.up-next {
  position: absolute;
  z-index: 6;
  top: 56px;
  right: 16px;
  width: 216px;
  padding: 10px;
  border-radius: 16px;
  background: rgba(14, 11, 38, 0.78);
  border: 1px solid rgba(255, 255, 255, 0.1);
  backdrop-filter: blur(10px);
  pointer-events: none;
}
.up-next-title { margin: 0 4px 8px; color: var(--screen-ink-2); font: 800 13px/1 var(--font-display); letter-spacing: 0.18em; text-transform: uppercase; }
.up-next ol { display: grid; gap: 4px; margin: 0; padding: 0; list-style: none; }
.up-next li { display: grid; grid-template-columns: 66px 1fr auto; align-items: center; gap: 8px; padding: 5px 6px; border-radius: 10px; }
.up-next li:first-child { background: rgba(255, 194, 26, 0.16); }
.up-next li:nth-child(n+3) { opacity: 0.72; }
.up-next li:nth-child(n+4) { opacity: 0.5; }
.up-key {
  justify-self: start;
  max-width: 100%;
  padding: 3px 7px;
  border-radius: 7px;
  background: #fff;
  color: #1a1540;
  font: 800 13px/1.1 var(--font-mono);
  box-shadow: 0 2px 0 #c9c2ee;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.up-action { overflow: hidden; color: var(--screen-ink); font-size: 12px; font-weight: 700; white-space: nowrap; text-overflow: ellipsis; }
.up-when { color: var(--screen-ink-2); font: 500 11px var(--font-mono); }
body[data-view-mode="piano"] .up-next,
.stage:has(.stage-card:not([hidden])) .up-next { display: none; }

/* Mouse aim. */
.aim-guide {
  position: absolute;
  z-index: 7;
  top: 50%;
  left: 50%;
  width: 240px;
  transform: translate(-50%, -50%);
  text-align: center;
  pointer-events: none;
  filter: drop-shadow(0 3px 9px rgba(0, 0, 0, 0.85));
}
.aim-guide svg { display: block; width: 100%; height: auto; overflow: visible; }
.aim-range { fill: rgba(14, 11, 38, 0.3); stroke: rgba(255, 255, 255, 0.2); stroke-width: 1; }
.aim-axis { stroke: rgba(255, 255, 255, 0.14); stroke-width: 1; stroke-dasharray: 3 8; }
.aim-trace { stroke: #fff; stroke-width: 3; stroke-linecap: round; }
.aim-target { fill: rgba(255, 194, 26, 0.16); stroke: var(--yellow); stroke-width: 4; }
.aim-target.on { fill: rgba(79, 195, 247, 0.3); stroke: var(--grade-perfect); }
.aim-actual { fill: #fff; stroke: rgba(10, 8, 29, 0.95); stroke-width: 3; }
.crosshair { fill: none; stroke: rgba(255, 255, 255, 0.8); stroke-width: 2; }
.aim-label { margin-top: -6px; font: 800 18px/1 var(--font-display); letter-spacing: 0.06em; text-transform: uppercase; }
.aim-key { margin-top: 4px; color: var(--screen-ink-2); font-size: 11px; }
.target-dot, .actual-dot { display: inline-block; width: 8px; height: 8px; margin: 0 3px 0 8px; border-radius: 50%; }
.target-dot { border: 2px solid var(--yellow); }
.actual-dot { background: #fff; }

/* The game's own reticle is the fixed reference. Only the simulated reticle
   and its error line are added over the video. */
.aim-guide.video-deviation { inset: 0; width: auto; transform: none; }
.aim-guide.video-deviation svg { width: 100%; height: 100%; }
.video-deviation .aim-range, .video-deviation .aim-axis,
.video-deviation .aim-target, .video-deviation .crosshair,
.video-deviation .aim-key { display: none; }
.video-deviation .aim-actual { fill: none; stroke: #fff; stroke-width: 2; }
.video-deviation .aim-trace { stroke-width: 1.5; stroke: var(--yellow); }
.video-deviation .aim-label {
  position: absolute;
  top: 62px;
  left: 50%;
  transform: translateX(-50%);
  width: max-content;
  max-width: 90%;
  padding: 6px 10px;
  border-radius: 10px;
  background: rgba(14, 11, 38, 0.85);
  font-size: 14px;
}

/* Simulated edit grid: the piece's tiles, the pro's pattern and your
   crosshair. Right of centre, so the action card stays readable. */
.edit-guide {
  position: absolute;
  z-index: 7;
  top: 50%;
  left: 76%;
  width: min(220px, 36%);
  transform: translate(-50%, -50%);
  text-align: center;
  pointer-events: none;
  filter: drop-shadow(0 3px 9px rgba(0, 0, 0, 0.85));
}
.edit-board { position: relative; aspect-ratio: 1; }
.edit-tiles { display: grid; gap: 5px; width: 100%; height: 100%; }
.edit-tile { border: 2px solid var(--violet); border-radius: 6px; background: color-mix(in srgb, var(--violet) 45%, transparent); }
.edit-tile.target { border-color: var(--yellow); border-style: dashed; }
.edit-tile.removed { background: rgba(10, 8, 29, 0.6); }
.edit-tile.next { box-shadow: inset 0 0 0 3px var(--yellow); }
.edit-tile.removed.target { border-style: solid; }
.edit-cursor {
  position: absolute;
  width: 16px;
  height: 16px;
  margin: -8px 0 0 -8px;
  border: 2px solid #fff;
  border-radius: 50%;
  background: rgba(10, 8, 29, 0.6);
}
.edit-label { margin-top: 10px; font: 800 18px/1 var(--font-display); letter-spacing: 0.06em; text-transform: uppercase; }
.edit-key { margin-top: 4px; color: var(--screen-ink-2); font-size: 11px; }
.key-target, .key-next, .key-removed { display: inline-block; width: 10px; height: 10px; margin: 0 3px 0 8px; border-radius: 3px; }
.key-target { border: 2px dashed var(--yellow); }
.key-next { box-shadow: inset 0 0 0 2px var(--yellow); background: color-mix(in srgb, var(--violet) 45%, transparent); }
.key-removed { background: rgba(10, 8, 29, 0.9); border: 1px solid var(--violet); }

/* The countdown: one big yellow key. */
.countdown {
  position: absolute;
  z-index: 12;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  display: grid;
  place-items: center;
  width: 172px;
  height: 172px;
  border-radius: 40px;
  background: var(--yellow);
  box-shadow: 0 12px 0 var(--yellow-edge), 0 30px 60px rgba(0, 0, 0, 0.5);
  color: #1a1540;
  font: 900 120px/1 var(--font-display);
  pointer-events: none;
}
.countdown.tick { animation: count-pop 1s ease-out; }
.countdown.go { background: var(--green); box-shadow: 0 12px 0 var(--green-edge), 0 30px 60px rgba(0, 0, 0, 0.5); color: #fff; font-size: 84px; text-transform: uppercase; }
@keyframes count-pop {
  0% { transform: translate(-50%, -50%) scale(1.22); opacity: 0.4; }
  16% { transform: translate(-50%, -50%) scale(1); opacity: 1; }
  100% { transform: translate(-50%, -50%) scale(0.95); opacity: 0.9; }
}

/* Cards that stop the run: a mistake, listen mode, a missing key. They are
   paper on the dark stage, with a coloured top edge for what kind they are. */
.stage-card {
  position: absolute;
  z-index: 15;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: min(540px, calc(100% - 32px));
  padding: 22px 24px 20px;
  border-top: 8px solid var(--card-tint, var(--blue));
  border-radius: 24px;
  background: var(--surface);
  color: var(--ink);
  box-shadow: 0 30px 70px rgba(0, 0, 0, 0.55);
  text-align: center;
}
.stage-card-mistake { --card-tint: var(--danger); }
.stage-card-listen { --card-tint: var(--pink); }
.stage-card-setup { --card-tint: var(--blue); }
.stage-card-title { color: var(--ink); font: 900 34px/1 var(--font-display); letter-spacing: 0.03em; text-transform: uppercase; }
.stage-card-mistake .stage-card-title { color: var(--danger); }
.stage-card-detail { margin-top: 8px; color: var(--ink-2); font-size: 14px; }
.stage-card-actions { display: flex; justify-content: center; flex-wrap: wrap; gap: 10px; margin-top: 18px; }
.stage-card-note { min-height: 1em; margin-top: 12px; color: var(--ink-2); font-size: 12px; }
.mistake-compare { display: flex; justify-content: center; gap: 14px; margin-top: 16px; }
.mistake-col { display: grid; gap: 8px; justify-items: center; }
.mistake-label { color: var(--ink-2); font: 800 13px/1 var(--font-display); letter-spacing: 0.16em; text-transform: uppercase; }
.mistake-col .coach-card { min-width: 160px; }
.listen-speak { margin-top: 10px; padding: 0; font-size: 13px; }
.stage:has(.stage-card:not([hidden])) .action-coach,
.stage:has(.stage-card:not([hidden])) .aim-guide { visibility: hidden; }

/* End-of-run results. */
.overlay {
  position: absolute;
  inset: 0;
  z-index: 20;
  display: grid;
  place-content: center;
  gap: 8px;
  padding: 24px;
  background: color-mix(in srgb, var(--screen) 88%, transparent);
  backdrop-filter: blur(6px);
  color: var(--screen-ink);
  text-align: center;
}
.overlay.hidden { display: none; }
.overlay h2 { margin: 0; font-size: 56px; letter-spacing: 0.04em; }
.overlay .big { font: 900 132px/0.9 var(--font-display); letter-spacing: -0.02em; }
.overlay .sub { color: var(--screen-ink-2); font-size: 14px; }
.overlay .pass { color: #3de08f; }
.overlay .failtext { color: var(--grade-miss); }
.overlay div.pass, .overlay div.failtext { font: 800 20px/1.2 var(--font-display); letter-spacing: 0.08em; text-transform: uppercase; }

/* ------------------------------------------------------------- dialogs */

dialog {
  width: 92vw;
  max-width: 480px;
  padding: 26px;
  border: 0;
  border-radius: 26px;
  background: var(--surface);
  color: var(--ink);
  box-shadow: 0 40px 90px -30px rgba(23, 18, 58, 0.6);
}
dialog::backdrop { background: rgba(23, 18, 58, 0.45); backdrop-filter: blur(4px); }
dialog h2 { margin: 0 0 10px; font-size: 34px; }
dialog menu { display: flex; justify-content: flex-end; gap: 10px; margin: 20px 0 0; padding: 0; }
dialog input[type="text"] { width: 100%; margin-top: 8px; min-height: 44px; font-size: 15px; }
dialog table { width: 100%; border-collapse: collapse; }
dialog.wide { max-width: 760px; }
#settings-panel, #lessons-panel { max-height: 66vh; overflow-y: auto; margin: 0 -6px; padding: 0 6px; }

/* Settings, rendered by settingsui.js. */
.settingsui .block { margin: 0 0 14px; padding: 14px 16px; border: 1px solid var(--line); border-radius: var(--r-card); background: var(--surface-2); }
.settingsui h3 { margin: 0 0 10px; font-size: 20px; }
.settingsui .cathead {
  margin: 14px 0 6px;
  color: var(--violet);
  font: 800 14px/1 var(--font-display);
  letter-spacing: 0.12em;
  text-transform: uppercase;
}
.settingsui .fields { display: grid; grid-template-columns: 1fr auto; gap: 8px 12px; align-items: center; }
.settingsui .field { display: contents; }
.settingsui .field label, .settingsui label { color: var(--ink); font-size: 13px; }
.settingsui .row { display: flex; flex-wrap: wrap; gap: 8px; align-items: center; margin: 8px 0; }
.settingsui .status { color: var(--ink-2); font-size: 12px; }
.settingsui .warn { color: var(--warn); font-size: 12px; }
.settingsui .confirm { color: var(--bad); font-size: 12px; }
.settingsui .bindtable { width: 100%; border-collapse: collapse; }
.settingsui .bindtable td { padding: 6px 0; border-bottom: 1px solid var(--line); }
.settingsui .bindtable tr:last-child td { border-bottom: 0; }
.settingsui .bindname { color: var(--ink-2); font-size: 13px; }
.settingsui .bindtable td:last-child { text-align: right; }
.settingsui .threshold { width: 76px; font-family: var(--font-mono); }
.settingsui { --tint: var(--violet); }
.settingsui label.field {
  grid-column: 1 / -1;
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 6px 0;
  border-top: 1px solid var(--line);
}
.settingsui label.field:first-child { border-top: 0; }
.settingsui label.field span { flex: 1; }
.settingsui div.field > label { display: flex; align-items: center; justify-content: space-between; gap: 12px; }
.settingsui div.field > label span { flex: 1; }
.settingsui .fields > .field > .sub { grid-column: 1 / -1; margin-top: -4px; }
.settingsui .bindtable tr.cathead td { padding: 14px 0 4px; text-align: left; border-bottom: 0; }
.settingsui .bindtable tr.listening .bindname { color: var(--violet); font-weight: 700; }
.srcbadge {
  justify-self: end;
  padding: 2px 8px;
  border-radius: 999px;
  background: var(--line);
  color: var(--ink-2);
  font: 700 10px/1.4 var(--font-mono);
  text-transform: uppercase;
  white-space: nowrap;
}
.srcbadge.src-measured { background: color-mix(in srgb, var(--green) 22%, var(--surface)); color: var(--ink); }
#binds-table td { padding: 6px 0; border-bottom: 1px solid var(--line); }
#binds-table td:first-child { color: var(--ink-2); font-size: 13px; }
#binds-table td:last-child { text-align: right; }
#binds-table button { min-width: 130px; font-family: var(--font-mono); font-size: 12px; }
#binds-table tr.required td:first-child::after { content: " *"; color: var(--violet); }

/* Lessons (L5), rendered by lessonui.js. */
.lessons { display: flex; flex-direction: column; gap: 12px; }
.lessons-suggestion {
  padding: 12px 14px;
  border-radius: 14px;
  background: color-mix(in srgb, var(--yellow) 22%, var(--surface));
  border-left: 5px solid var(--yellow);
  color: var(--ink);
  font-size: 13px;
  font-weight: 600;
}
.lessons-empty { color: var(--ink-2); }
.lesson { padding: 14px 16px; border: 1px solid var(--line); border-radius: var(--r-card); background: var(--surface-2); }
.lesson-head { display: flex; align-items: center; flex-wrap: wrap; gap: 10px; }
.lesson-head .lesson-state { min-width: 0; }
.lesson-head h3 { margin: 0; font-size: 22px; }
.lesson-count { margin-left: auto; color: var(--ink-2); font: 600 12px var(--font-mono); }
.lesson-goal { margin: 6px 0 10px; color: var(--ink-2); font-size: 13px; }
.lesson-items { display: flex; flex-direction: column; margin: 0; padding: 0; list-style: none; }
.lesson-item { display: flex; align-items: center; flex-wrap: wrap; gap: 10px; padding: 8px 0; border-top: 1px solid var(--line); font-size: 13px; }
.lesson-item .lesson-play { min-width: 210px; text-align: left; }
.lesson-item .lesson-best { margin-left: auto; font-family: var(--font-mono); font-size: 11px; }
.lesson-target { font-family: var(--font-mono); font-size: 11px; }
.lesson-state {
  min-width: 82px;
  padding: 3px 8px;
  border-radius: 999px;
  background: var(--line);
  color: var(--ink-2);
  font: 800 12px/1.2 var(--font-display);
  letter-spacing: 0.1em;
  text-align: center;
  text-transform: uppercase;
}
.lesson-state.available { background: var(--blue); color: #fff; }
.lesson-state.passed { background: var(--yellow); color: #1a1540; }
.lesson-state.mastered { background: var(--green); color: #fff; }
.lesson-target, .lesson-best, .lesson-note, .lesson-requires, .lesson-unlocks { color: var(--ink-2); font-size: 12px; }
.lesson-item.locked { opacity: 0.6; }

/* --------------------------------------------------------------- toast */

.toast {
  position: fixed;
  z-index: 50;
  left: 50%;
  bottom: 24px;
  transform: translateX(-50%);
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 8px 8px 8px 18px;
  border-radius: 999px;
  background: var(--ink);
  color: var(--bg);
  box-shadow: 0 16px 40px -10px rgba(23, 18, 58, 0.6);
  font-size: 13px;
  font-weight: 600;
}
.toast.bad { background: var(--danger); color: #fff; }
.toast button { border-radius: 999px; min-height: 32px; }

/* ------------------------------------------- shared by the other pages */

.bar {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
  margin: 14px 20px 0;
  padding: 10px 12px 10px 16px;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--r-card);
  box-shadow: var(--shadow-card);
  flex: 0 0 auto;
}
.bar .brand { font-size: 24px; }
.bar label { font-weight: 600; }

.ghostlink {
  padding: 8px 14px;
  border: 1px solid var(--line-strong);
  border-radius: var(--r-btn);
  box-shadow: 0 2px 0 var(--line-strong);
  background: var(--surface);
  color: var(--ink);
  font-size: 13px;
  font-weight: 600;
  text-decoration: none;
}
.ghostlink:hover { background: var(--surface-2); }

/* The tool pages (autochart, gamepad timing, mouse precision): one column of
   paper with the page tabs on top. */
body.page { display: block; height: auto; min-height: 100%; padding: 18px clamp(16px, 4vw, 48px) 56px; }
body.page #sitenav > .sitenav { margin-bottom: 26px; }
body.page h1 { margin: 0 0 10px; font-size: clamp(38px, 5vw, 60px); letter-spacing: 0.02em; }
body.page h2 { font-size: 26px; letter-spacing: 0.04em; }
body.page h3 { font-family: var(--font-ui); font-weight: 700; text-transform: none; letter-spacing: 0; }
body.page p { line-height: 1.55; }
body.page code { font-family: var(--font-mono); font-size: 0.92em; }
.status.ok, .verdict.ok, #save-status.ok { border-left-color: var(--green); }
.status.bad, .verdict.bad, #save-status.bad { border-left-color: var(--danger); }
.status.busy, .verdict.warn { border-left-color: var(--yellow); }

/* ---------------------------------------------------------- small screens */

@media (max-width: 1280px) {
  .workspace { grid-template-columns: minmax(0, 1fr) 310px; }
  .profile-picker { display: none; }
}

@media (max-width: 1080px) {
  .drillbar .spacer { display: none; }
  .transport-group:last-child { margin-left: 0; }
}

@media (max-width: 860px) {
  html, body { height: auto; }
  .topbar { padding: 12px 12px 0; }
  .brandrow { flex-wrap: wrap; gap: 8px; }
  .brandrow > button { min-height: 32px; padding: 6px 11px; }
  .pagenav { order: 3; flex: 1 0 100%; }
  .pagenav .sitenav { flex-wrap: nowrap; }
  .drillbar { padding: 8px; gap: 8px; }
  .drillbar .field { flex: 1 1 100%; }
  .drillbar .field select { flex: 1; width: auto; }
  .drillbar .field-label { width: 70px; }
  .profile-picker { display: inline-flex; }
  .view-mode-toggle { flex: 1; }
  .mode-btn { flex: 1; }
  .start { flex: 1 0 100%; }
  .workspace { display: flex; flex-direction: column; padding: 12px; }
  .stage-column { flex: 0 0 auto; }
  #stage { flex: 0 0 auto; height: max(52vh, 360px); }
  .workspace .hud { overflow: visible; }
  .hud-tabs { top: 6px; }
  .action-coach { top: 13%; }
  .coach-card { min-width: 112px; padding-inline: 10px; }
  .transport-main { flex-wrap: wrap; }
  .transport-main .scrubber { order: 3; flex: 1 0 100%; }
  .transport-main .transport-primary { flex: 1; }
  .up-next { display: none; }
}

@media (max-width: 520px) {
  .brand-name { font-size: 20px; }
  .brand-mark { grid-template-columns: repeat(2, 9px); }
  .brand-mark i { width: 9px; height: 9px; }
  .session-title, .session-segment { display: none; }
  .stage-context { top: 10px; left: 10px; right: 10px; }
  .action-coach { width: calc(100% - 20px); }
  .coach-cards { gap: 6px; }
  .coach-card { min-width: 0; flex: 1; padding: 10px 8px; }
  .coach-action { font-size: 15px; }
  .frames { display: none; }
  .transport-group { border: 0; padding: 0; }
  .countdown { width: 132px; height: 132px; border-radius: 32px; font-size: 92px; }
  .stage-card-title { font-size: 28px; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation: none !important; transition: none !important; }
}